17.
In a hydrogen atom, the distance between
proton and electron is 5.3 x 10-11 m. The
electrical force of attraction between them will
be
(A) 6,3 × 10-N
(B) 8.2 x 10-8N
(C) 9.6 x 10-8N (D) 12.2 x 10-8N
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